Library implementing RRA (Remote Replication Agent), a protocol used for synchronisation. This protocol is used for all data synchronisation until WM5, at which point Airsync is used for the majority. RRA is still used for file synchronisation however.

The dccm daemon negotiates the initial connection with a WM device, and may provide keep-alive signals and client connections, depending on the device version and flavour of dccm.

There have been a number of dccm 'flavours'. The original, also known as synce-dccm, is now considered obsolete and should not be used. Vdccm is a natural progression of dccm which is not greatly used anymore. Odccm is the most common in use at the moment, and uses dbus to provide connections to both legacy and modern devices. Hal-dccm is a new option that integrates the dccm functionality into hal to provide a more platform consistent interface.

To use advanced network features (rndis) with a WM5 or later device, which is recommended, you must use the usb-rndis-[lite|ng] driver from SynCE. For older devices or to use serial with WM5, if synce-hal is not used you will require the synce-serial package. You will of course also need a dccm daemon, synce-hal or odccm is recommended.